Henry poth



H. PTH.

l Wheel.

No. 78,480. Patented June 2, 1888;A

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@feiten Atutes gettin @fitte Letters Patent No. 78,480, dated June 2, 1868.

IMPROVEMENT 1N WHEELS.

die rigrhtlt nitriet mit time Entert ttett mit taking und nf tige 5min.

To ALL WHoM rr MAY ooNcEnN.

Be it known that I, HENRY' PDTB, of Pittsburg, in the county of Allegheny, and State of Pennsylvania, have invented a new and useful Improvement in Wheels for Vehicles; vand I do hereby declare that the followling is a full, clear, and exact description thereof, which will enable others skilled inl the art to makeand use the same, reference being had tothe accompanying drawings, forming part of this specification, in which#- Figure l is a side v iew of my'improved wheel.

Figure?. is a detail top view of the hub.

Figure 3 is a detail view of the threaded box'.

Figure 4 is a' detail view ofthe cap-plate.

Figures 5 and are corresponding views of a clamp for-holding the spokes in position while the hub is put together or taken apart. p l Y Similarletters of reference indicate like parts.

The nature of this invention relates to construction of metallic hubs.

It consists in forming the hub-fiangcs with correspondent wedge-shaped feathers or projections, which` when the said plates are brought together, slide upon each other and form the mortisesof the hub, and provide the means by which the tenons of the spokes are wedged or clamped firmly in place.

It consist in the employment of a differential threaded box,`by which the anges are drawn together upon the spoke-tenons with great power.

It consists of metallic tips, by which the spokes are a'xed to the rim of the wheel.

The construction of all of which devices will be duly set forth in the following.

The hub flanges are shown at a a, and are formed with correspondent wedge-shaped projections or feathers, 6.1; b, dto., upon the proximate faces of the said flanges. v i

.'lhese feathers are located radially aroundthe faces of the iianges, and when thc latter are brought"` together, the b evel or incline of each feather fits with finished contact upon the corresponding bevel or incline of the opposite feather, as shown, thus forming the-mortise for the reception ofthe tenori-end of the spoke.

'The hub-Bauges lare formed with a hollow screw, to fit lon the box c, shown indetail at iig. 3. This box is formed with two threads, d and e, of different pitch, forming what is generally known as n. differential screw, the advantages of which for gaining a great increase of power is generally understood by mechanics. I

The different threads, d and e, fit thc hollow screws in the fianges, and draw them together when the box is' turned.` A hole,f, in thc end of the box, serves for the insertion of a. lever, by which the box is turned in screwing up the flanges.l Y

Caps g g are screwed on tothe ends of t'h'c box, and thus complete the hub. A portionof thc spokes may be provided'with metallic cap-plates t, having a terminal cross-head, z', formed to provide a. continuation of the wooden rim, and to conform to the shape of the same. I

The cross-head t' is hollowfto admit the reduced ends vof the rim, as shown at lig. 4, whereby c. firm junction of the parts composing the rim is obtained. I I

The clamp-rings, shown at Jrigs. 5 and 6, are for the purpose of clamping the spokes, and retaining them in the proper position when the hub-flanges are to be removed for any reason.

Thin plates, of canvas, leather, or other elastic material, are placed on one or both sides of the tenons of the spoke, to prevent the metal from cutting the wood, as shown at k.

The several parts of my invention are formed of cast metal or malleable iron, and may be chcaply'produced and easily fitted to the wheel. l v

Having thus described my invention, I claim as new, and desire toV secure by Letters Patent- The hub-flanges a a, provided with corresponding wedge-feathers b b, when adapted to he drawn together by means of the differential screw-box d e, on which the screw-caps g are fitted, thc tenons of the spokes being protected by elastic material k, all constructed and arranged as and for the purpose described.

The abovespecitication of my invention signed by me, this day of 1868.

HENRY sort-1.

Witnesses:

AND. HUMBERT, G. A. KLAcns. 

